test: prevent extraneous HOSTNAME substitution in test-runner-output

[Renegade334]

I have a box named "io". This got a good chuckle out of me.

=== release test-runner-output ===                                            
Path: parallel/test-runner-output
Test failure: 'test-runner/output/junit_reporter.js'
Location: test/parallel/test-runner-output.mjs:330:5
AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:
+ actual - expected
... Skipped lines

+ '<?xml versHOSTNAMEn="1.0" encoding="utf-8"?>\n' +
- '<?xml version="1.0" encoding="utf-8"?>\n' +
    '<testsuites>\n' +
    '\t<testcase name="sync pass todo" time="*" classname="test">\n' +
    '\t\t<skipped type="todo" message="true"/>\n' +
    '\t</testcase>\n' +
    '\t<testcase name="sync pass todo with message" time="*" classname="test">\n' +
...
    '\t</testcase>\n' +
+   '\t<testcase name="async assertHOSTNAMEn fail" time="*" classname="test" failure="Expected values to be strictly equal:true !== false">\n' +
-   '\t<testcase name="async assertion fail" time="*" classname="test" failure="Expected values to be strictly equal:true !== false">\n' +
    '\t\t<failure type="testCodeFailure" message="Expected values to be strictly equal:true !== false">\n' +
    '[Error [ERR_TEST_FAILURE]: Expected values to be strictly equal:\n' +
    '\n' +
    'true !== false\n' +
    '] {\n' +
    "  code: 'ERR_TEST_FAILURE',\n" +
    "  failureType: 'testCodeFailure',\n" +
+   '  cause: AssertHOSTNAMEnError [ERR_ASSERTION]: Expected values to be strictly equal:\n' +
-   '  cause: AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:\n' +
    '  \n' +
    '  true !== false\n' +
    '  \n' +
    '      *\n' +
    '      *\n' +
...
    '\t</testcase>\n' +
+   '\t<testcase name="unhandled rejectHOSTNAMEn - passes but warns" time="*" classname="test"/>\n' +
+   '\t<testcase name="async unhandled rejectHOSTNAMEn - passes but warns" time="*" classname="test"/>\n' +
-   '\t<testcase name="unhandled rejection - passes but warns" time="*" classname="test"/>\n' +
-   '\t<testcase name="async unhandled rejection - passes but warns" time="*" classname="test"/>\n' +
    ...,
  operator: 'strictEqual'
}

[nodejs-github-bot]

Review requested:

• @nodejs/test_runner

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/66505/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.20%. Comparing base (53abd1a) to head (ca3e005).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #58076      +/-   ##
==========================================
- Coverage   90.20%   90.20%   -0.01%     
==========================================
  Files         630      630              
  Lines      186391   186391              
  Branches    36612    36611       -1     
==========================================
- Hits       168134   168127       -7     
+ Misses      11068    11062       -6     
- Partials     7189     7202      +13     

see 37 files with indirect coverage changes

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